--- nono/host/diskimage.cpp	2026/04/29 17:05:11	1.1.1.3
+++ nono/host/diskimage.cpp	2026/04/29 17:05:21	1.1.1.4
@@ -36,12 +36,10 @@ DiskImage::CreateHandler(const std::stri
 	cow_enable = false;
 
 	// 今の所 Raw しかない
-	try {
-		driver.reset(new DiskImageRaw(pathname));
+	driver.reset(new DiskImageRaw(pathname));
+	if ((bool)driver) {
 		return true;
-	} catch (...) {
 	}
-
 	return false;
 }